Thread: 'GetIndex' : not all control paths return a value

Having some trouble, Could use some help.

Code:

 

#define _CRT_SECURE_NO_DEPRECATE
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#define SZ 100
typedef struct 
	{
		char owner[SZ];
		char type[SZ];
		char name[SZ];
		char date[SZ];
		char sex;
		int age;
		double cost;
	}pet;

void GetPet(pet mypet[]);
void Menu();
void addEntry(pet mypet[], int numentries);
int GetIndex(pet mypet[]);
void deleteEntry(pet mypet[], int numentries, int index);
void setAge(pet mypet[], int numentries);
void Display(pet mypet[]);
void Save(pet mypet[]);
void Clear(pet mypet[]);
char Quit();

int main()
{
	pet mypet[SZ];
	int numentries=5;
	char choice;
	char again='Y';
	int index;
	
	while(again=='Y' || 'y')
	{
		GetPet(mypet);
		setAge(mypet, numentries);
		Menu();
		scanf(" %c", &choice);
		switch(choice)
		{
			case 'A': addEntry(mypet, numentries);
					  numentries++;
				      break;
			case 'D': index=GetIndex(mypet);
				      deleteEntry(mypet, numentries, index);
				      numentries--;
				      break;
			case 'P': Display(mypet);
				      break;
			case 'S': Save(mypet);
				      break;
			case 'C': Clear(mypet);
				     numentries=0;
				     break;
			case 'Q': again=Quit();
					  break;
		}
	}
	return 0;
	
}

void GetPet(pet mypet[])
{
	strcpy(mypet[0].owner,"Doe");
	strcpy(mypet[0].type,"Snake");
	strcpy(mypet[0].name,"Sassy");
	strcpy(mypet[0].date,"11/23/07");
	mypet[0].sex='F';
	mypet[0].age=9;
	mypet[0].cost=112.56;

	strcpy(mypet[1].owner,"Johnson");
	strcpy(mypet[1].type,"Parrot");
	strcpy(mypet[1].name,"Polly");
	strcpy(mypet[1].date,"1/14/06");
	mypet[1].sex='M';
	mypet[1].age=15;
	mypet[1].cost=224.90;

	strcpy(mypet[2].owner,"Willruth");
	strcpy(mypet[2].type,"Dog");
	strcpy(mypet[2].name,"Winston");
	strcpy(mypet[2].date,"5/28/07");
	mypet[2].sex='M';
	mypet[2].age=10;
	mypet[2].cost=157.32;

	strcpy(mypet[3].owner,"Mendes");
	strcpy(mypet[3].type,"Cat");
	strcpy(mypet[3].name,"Dandylion");
	strcpy(mypet[3].date,"2/07/07");
	mypet[3].sex='F';
	mypet[3].age=2;
	mypet[3].cost=300.87;

	strcpy(mypet[4].owner,"Basic");
	strcpy(mypet[4].type,"Cat");
	strcpy(mypet[4].name,"Kiki");
	strcpy(mypet[4].date,"6/17/05");
	mypet[4].sex='F';
	mypet[4].age=3;
	mypet[4].cost=273.99;
}

void Menu()
{
	printf("\nA....Add a new record");
	printf("\nD....Delete a record");
	printf("\nP....Display all records");
	printf("\nS....Save all records to a file");
	printf("\nC....Clear all records");
	printf("\nQ....Quit");
}

void addEntry(pet mypet[], int numentries)
{
	printf("\nEnter owner's name: ");
	scanf(" %s", mypet[numentries].owner);
	printf("\nEnter type of pet: ");
	scanf(" %s", mypet[numentries].type);
	printf("\nEnter name of pet: ");
	scanf(" %s", mypet[numentries].name);
	printf("\nEnter date the pet was last seen: ");
	scanf(" %s", mypet[numentries].date);
	printf("\nEnter sex of the pet: ");
	scanf(" %c", mypet[numentries].sex);
	printf("\nEnter age of the pet: ");
	scanf(" %d", mypet[numentries].age);
	printf("\nEnter the cost of the visit: ");
	scanf(" %lf", mypet[numentries].cost);
}

int GetIndex(pet mypet[])
{
	char lastName[SZ];
	char petName[SZ];
	int i;
	printf("\nEnter last name of the owner: ");
	scanf(" %s", lastName);
	printf("\nEnter name of pet: ");
	scanf(" %s", petName);
	for(i=0;i<SZ;i++)
	{
		if(strcmp(lastName, mypet[i].owner)==0 && strcmp(petName, mypet[i].name)==0)
		{
			return i;
		}
		else return -1;
	}
}

void deleteEntry(pet mypet[], int numentries, int index)
{
	mypet[index]=mypet[numentries-1];
}

void setAge(pet mypet[], int numentries)
{
	int j;
	for(j=numentries; j<SZ; j++)
	{
		mypet[j].age=-1;
	}
}

void Diplay(pet mypet[])
{
	int k;
	for(k=0;k<SZ;k++)
	{
		if(mypet[k].age!=-1)
		{
			printf("\nOwner: %s", mypet[k].owner);
			printf("\nType of animal: %s", mypet[k].type);
			printf("\nName of pet: %s", mypet[k].name);
			printf("\nDate animal was last seen: %s", mypet[k].date);
			printf("\nSex of animal: %c", mypet[k].sex);
			printf("\nAge of animal: %d", mypet[k].age);
			printf("\nCost of visit: %f", mypet[k].cost);
		}
	}
}

void Save(pet mypet[])
{
    int x;
	FILE *outp;
	outp=fopen("vet.txt", "w");
	for(x=0;x<SZ;x++)
	{
		if(mypet[x].age!=-1)
		{
			fprintf(outp, "\nThe owners name is %s", mypet[x].owner);
			fprintf(outp, "\nThe type of pet is %s", mypet[x].type);
			fprintf(outp, "\nThe name of the pet is %s", mypet[x].name);
			fprintf(outp, "\nThe date pet was last seen is %s", mypet[x].date);
			fprintf(outp, "\nThe sex of the pet is %c", mypet[x].sex);
			fprintf(outp, "\nThe age of the animal is %d", mypet[x].age);
			fprintf(outp, "\nThe cost of the visit is %f", mypet[x].cost);
		}
	}
	fclose(outp);
}

void Clear(pet mypet[])
{
	int y;
	for(y=0;y<SZ;y++)
	{
		mypet[y].age=-1;
	}
}

char Quit()
{
	char input='N';
	return input;
}

Well it should be pretty obvious from the error. In your GetIndex() function, not all control paths return a value.
i.e. If SZ == 0, then the for loop will never execute and there is no return statement after the for loop.

also, the for loop is kind of redundant, because no matter what, it will execute 0 or 1 times. once inside the for loop, it will return if the first condition, and it will return else--it returns in both cases so the loop will execute at most once.

Code:

while(again=='Y' || 'y')

this is always true. change it to:

Code:

while(again=='Y' || again== 'y')

Should I take the return -1 out of the loop?